Mark, do you have a Mk3 available to build the frame jig and 'glass moulds from
I have a Mk111 available to get any measurement I need and I already bought some bodywork from Classic Motorcycle Fiberglass a couple of trips back to Oz so I'll just copy that.
Here's my worry Mark. You didn't answer if the Mk3 Metisse frame you have "available" is there in China with you or if you intend to just get the measurments and bend profiles by email from Australia. If you intend to build this frame by the latter method I can't see how you'd be able to replicate the specifics of a Metisse frame without having an actual frame on hand to build the jig from. As a boilermaker/welder with 40 years of experience who's had some experience in motorcycle and race car chassis construction, I know that to build a replica of anything you need to jig off the original, or at least have what you're copying on hand for reference.
If you do indeed have a frame and swingarm to jig from at hand in China which particular Mk3 is it? Many people falsely believe that all Rickman Metisse Mk3a frames are the same, differing only in engine mountings or plates. However,as you no doubt know, eash Metisse MK3a frame is subtly different from another, dependent on which engine you're using. For instance, Walters XS650 engine wouldn't fit in Jikovs Triumph Mk3 frame or Jonesy's Black Betty unit construction ESO Mk3 Metisse frame is totally different in dimensions to Franks Manx Norton powered version yet they were both made by Pat French....on different jigs. A Triumph pre unit Mk 3 frame is different to that needed for a unit construction Triumph.
I differ from the neersayers in that I think that this project could be a goer but.....it has to be done right.
If the project is merely to be a Metisse-ish cafe racer, close enough is good enough but if, as you're implying, the side benefit of the project is to present the frames as a "cheap" pre '65 legal kit, they have to be build as close to a perfect replica of the original as possible or the rule Nazis will be all over it like a rugby scrum.